MANCHESTER, Mo. — St. Louis County highway officials are crediting a 6-year-old boy with giving them some direction on making their road signs more accurate.

KTVI-TV says first-grader David Hindes apparently noticed that a sign in the St. Louis suburb of Manchester told motorists that a single curve was ahead rather than the multiple twists and turns that actually unfold.

The boy repeatedly complained to his parents about the discrepancy until his dad suggested he take action. The boy wrote a letter to highway administrators who called him the next day to tell him he’s right.

The sign has since been updated.

His attentiveness — and persistence — won him a tour of the county shop where signs are made.

David Hindes’ mom says he was so happy, it was as if he had visited Santa’s workshop.